Re: [Xen-devel] [PATCH v2 1/3] x86/boot: add acpi rsdp address to setup_header

2017-12-08 Thread Juergen Gross
On 08/12/17 09:48, Ingo Molnar wrote: > > * Juergen Gross wrote: > +Offset/size: 0x268/8 +Protocol: 2.14+ + + This field can be set by the boot loader to tell the kernel the + physical address of the ACPI RSDP table. + + A value of 0 indicates the kerne

Re: [Xen-devel] [PATCH v2 1/3] x86/boot: add acpi rsdp address to setup_header

2017-12-08 Thread Ingo Molnar
* Juergen Gross wrote: > >> +Offset/size: 0x268/8 > >> +Protocol: 2.14+ > >> + > >> + This field can be set by the boot loader to tell the kernel the > >> + physical address of the ACPI RSDP table. > >> + > >> + A value of 0 indicates the kernel should fall back to the standard > >> + m

Re: [Xen-devel] [PATCH v2 1/3] x86/boot: add acpi rsdp address to setup_header

2017-12-08 Thread Juergen Gross
On 08/12/17 08:16, Ingo Molnar wrote: > > * Juergen Gross wrote: > >> Xen PVH guests receive the address of the RSDP table from Xen. In order >> to support booting a Xen PVH guest via grub2 using the standard x86 >> boot entry we need a way fro grub2 to pass the RSDP address to the >> kernel. >>

Re: [Xen-devel] [PATCH v2 1/3] x86/boot: add acpi rsdp address to setup_header

2017-12-08 Thread Ingo Molnar
* Jan Beulich wrote: > >>> On 08.12.17 at 08:16, wrote: > > Also, a more fundamental question: why doesn't Xen use EFI to hand over > > hardware configuration details? > > Iirc the main purpose of the change here is to allow booting PVH > (guest or Dom0) with Grub2 in the middle. PVH, at leas

Re: [Xen-devel] [PATCH v2 1/3] x86/boot: add acpi rsdp address to setup_header

2017-12-08 Thread Jan Beulich
>>> On 08.12.17 at 08:16, wrote: > Also, a more fundamental question: why doesn't Xen use EFI to hand over > hardware configuration details? Iirc the main purpose of the change here is to allow booting PVH (guest or Dom0) with Grub2 in the middle. PVH, at least for the time being, is something t

Re: [Xen-devel] [PATCH v2 1/3] x86/boot: add acpi rsdp address to setup_header

2017-12-07 Thread Ingo Molnar
* Juergen Gross wrote: > Xen PVH guests receive the address of the RSDP table from Xen. In order > to support booting a Xen PVH guest via grub2 using the standard x86 > boot entry we need a way fro grub2 to pass the RSDP address to the > kernel. > > For this purpose expand the struct setup_head

[Xen-devel] [PATCH v2 1/3] x86/boot: add acpi rsdp address to setup_header

2017-12-07 Thread Juergen Gross
Xen PVH guests receive the address of the RSDP table from Xen. In order to support booting a Xen PVH guest via grub2 using the standard x86 boot entry we need a way fro grub2 to pass the RSDP address to the kernel. For this purpose expand the struct setup_header to hold the physical address of the